This view of the twilight sky and Martian horizon taken by NASA's Curiosity Mars rover includes Earth as the brightest point of light in the night sky. Earth is a little left of center in the image, and our moon is just below Earth.

This frame from an animation from NASA's Mars rover Curiosity shows the rover drilling into rock target 'Cumberland.' The drilling was performed during the 279th Martian day, or sol, of the Curiosity's work on Mars (May 19, 2013).

This image from the Mars Hand Lens Imager on NASA's Mars rover Curiosity shows the patch of rock cleaned by the first use of the rover's Dust Removal Tool (DRT). The tool is a motorized, wire-bristle brush on the turret at the end of the rover's arm.

The two bodies in this portion of an evening-sky view by NASA's Mars rover Curiosity are Earth and Earth's moon. The rover's Mast Camera (Mastcam) imaged them in the twilight sky of Curiosity's 529th Martian day, or sol (Jan. 31, 2014).

NASA's Curiosity Mars rover used the MAHLI camera at the end of its arm in April and May 2014 to take dozens of component images combined into this self-portrait where the rover drilled into a sandstone target called 'Windjana.'

This frame from an animation shows five versions of observations that NASA's Curiosity made about one hour apart while Mercury was passing in front of the sun on June 3, 2014. Two sunspots, each about the diameter of Earth, also appear.

This image from the Navigation Camera (Navcam) on NASA's Curiosity Mars rover shows two holes at top center drilled into a sandstone target called 'Windjana.' The farther hole, with larger pile of tailings around it, is a full-depth sampling hole.

NASA's Curiosity Mars rover completed a shallow 'mini drill' test April 29, 2014, in preparation for full-depth drilling at a rock target called 'Windjana.' The hole results from the test is 0.63 inch across and about 0.8 inch deep.

This image from an animation shows a patch of sandstone scrubbed with the Dust Removal Tool, a wire-bristle brush, on NASA's Curiosity Mars rover. This rock target is called 'Windjana,' after a gorge in Western Australia.

NASA's Curiosity Mars rover used its Navigation Camera (Navcam) on April 11, 2014, to record this stereo scene of a butte called 'Mount Remarkable' and surrounding outcrops. You need 3-D glasses to view this image.

NASA's Curiosity Mars rover used its Navigation Camera (Navcam) on April 11, 2014, to record this scene of a butte called 'Mount Remarkable' and surrounding outcrops at a waypoint called 'the Kimberley' inside Gale Crater.

Stereo View of Curiosity and Rover Tracks at 'the Kimberley,' April 2014

NASA's Curiosity Mars rover and its tracks are visible in this view combining information from three observations by the HiRISE camera on NASA's Mars Reconnaissance Orbiter. You need 3-D glasses to view this image.

NASA's Curiosity Mars rover and tracks from its driving are visible in this view from orbit, acquired on April 11, 2014, by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.

This map shows the route driven by NASA's Curiosity Mars rover from the 'Bradbury Landing' location where it landed in August 2012 (the start of the line in upper right) to a major waypoint called 'the Kimberley'.

This map shows the route driven by NASA's Curiosity Mars in its approach to and April 1, 2014, arrival at a waypoint called 'the Kimberley,' which rover team scientists chose in 2013 as the location for the mission's next major investigations.

Curiosity's View From Arrival Point at 'The Kimberley' Waypoint (Stereo)

NASA's Curiosity Mars rover recorded this stereo view of various rock types at waypoint called 'the Kimberley' shortly after arriving at the location on April 2, 2014. You need 3-D glasses to view this image.

NASA's Curiosity Mars rover recorded this view of various rock types at waypoint called 'the Kimberley' shortly after arriving at the location on April 2, 2014. The site offers a diversity of rock types exposed close together.

Curiosity's View From Before Final Approach to 'The Kimberley' Waypoint

This view from NASA's Curiosity Mars rover was taken the day before the rover's final approach drive to "the Kimberley" waypoint, selected months ago as the location for the mission's next major investigations.

Sandstone layers with varying resistance to erosion are evident in this Martian scene recorded by the Mast Camera on NASA's Curiosity Mars rover on Feb. 25, 2014, about one-quarter mile (about 400 meters) from a planned waypoint called "the Kimberley."

This stereo view combining images taken on Feb. 10, 2014, by the Navigation Camera (Navcam) on NASA's Curiosity Mars rover looks back to where the rover crossed a dune at 'Dingo Gap' four days earlier. You need 3D glasses to view this image.

This panorama combining images taken on Feb. 10, 2014, by NASA's Curiosity Mars rover looks back to where the rover crossed a dune at 'Dingo Gap' four days earlier. The view is centered toward the east and spans about 225 degrees.